1209965 has 4 divisors (see below), whose sum is σ = 1451964. Its totient is φ = 967968.

The previous prime is 1209959. The next prime is 1209973. The reversal of 1209965 is 5699021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 155236 + 1054729 = 394^2 + 1027^2 .

It is a cyclic number.

It is not a de Polignac number, because 1209965 - 2⁸ = 1209709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120992 + ... + 121001.

It is an arithmetic number, because the mean of its divisors is an integer number (362991).

2^1209965 is an apocalyptic number.

It is an amenable number.

1209965 is a deficient number, since it is larger than the sum of its proper divisors (241999).

1209965 is an equidigital number, since it uses as much as digits as its factorization.

1209965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241998.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 1209965 is about 1099.9840907940. The cubic root of 1209965 is about 106.5591962266.

The spelling of 1209965 in words is "one million, two hundred nine thousand, nine hundred sixty-five".